Summary

• During week 40 (October 2–8, 2017), all-cause activity remained stable across all age groups. Hospitalizations following a visit to a healthcare facility were slightly down among children under 2 years of age (-7%) after having risen in week 39. They remained stable in the other age groups.

• Most seasonal illnesses remained stable or declined across all age groups. Notable trends across all age groups include: a decrease in visits for acute bronchitis after three consecutive weeks of increases (-14% among children and -16% among adults), for ENT conditions (-8% among children and -11% among adults), and for asthma attacks, among children for the fourth week (-13%), and among adults (-20%) for the first week following four weeks of increases. Furthermore, there was an increase in emergency department visits among children under 2 years of age and adults aged 15–74 for conjunctivitis (32% and 16%, respectively), as well as for general malaise among children aged 2–14 (+10%). Finally, for the fifth consecutive week, bronchiolitis has risen slightly among children under 2 years of age (+4%, or +37 cases), with a slightly higher proportion of cases compared to the past two years.

• Overall, the most common conditions are decreasing or stable across all age groups. Notably, following an increase in week 39, there was a decrease in visits for cardiac decompensation (-11%) and pneumonia (-8%) among people aged 75 and older. Among children, there was an increase in visits for burns among those under 2 years of age (+23%, or +33 cases) and for neurological disorders, for the second consecutive week, among those aged 2–14 (+10%, or +66 cases).